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Published byRosaline Manning Modified over 8 years ago
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3.4 Parallel and Perpendicular Lines 1
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Objectives Understand the difference between parallel and perpendicular lines Use the properties of parallel and perpendicular lines to solve for angle measurements
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Parallel and Perpendicular Lines Parallel lines Coplanar lines that do not intersect Perpendicular lines Coplanar lines that intersect at 90 o
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Transitive Property of Parallel Lines Theorem 3.7 – if two lines are parallel to the same line, then they are parallel to each other If a || b and b || c then a || c
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Theorem 3.8 Theorem 3.8 – if two lines are perpendicular to the same line, then they are parallel to each other. Notation for Perpendicular
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Perpendicular Transversal Theorem Theorem 3.9 – if a line is perpendicular to one of two parallel lines, then it is also perpendicular to the other
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Take Home Message Parallel vs Perpendicular Perpendicular Transversal Theorem
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